async Task Verify(VerifyFileJson verifyFile) { using (var file = await UIApp.OpenFilePicker2()) { if (file.Valid) { IsBusy = true; Toast(".VerificationFilePage.Wait"); var valid = await Task.Run(() => VerifyFileJson.CheckHash(file.Stream, verifyFile.GetHash(), verifyFile.length)); IsBusy = false; await MessageAsync(valid? ".VerifyPage.Success" : ".VerifyPage.Failure"); } } }